1977 Results for Corn

John D. Hamaker, co-author with Don Weaver, The Survival of Civilization

Michigan, 1976-1977

Glacial moraine gravel dust spread on 10 acres.

• In an area of sparse rainfall and dry summers, and with no irrigation, the corn produced 65 bushels per acre, compared to yields of under 25 bushels per acre from other local farms.
• Independent analyses revealed the following increases in nutrients, compared with the same type of corn grown with chemical fertilizers nearby:
  • 28% more protein
  • 47% more calcium
  • 57% more phosphorus
  • 60% more magnesium
  • 90% more potassium

See The Survival of Civilization for further details and photo description.